WO2022249441A1 - 検出回路、受信回路及び半導体集積回路 - Google Patents
検出回路、受信回路及び半導体集積回路 Download PDFInfo
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- 230000005669 field effect Effects 0.000 description 80
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
- H03F3/45183—Long tailed pairs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3211—Modifications of amplifiers to reduce non-linear distortion in differential amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
- H03F3/45273—Mirror types
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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- H—ELECTRICITY
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- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/261—Amplifier which being suitable for instrumentation applications
Definitions
- the present invention relates to detection circuits, reception circuits, and semiconductor integrated circuits.
- Patent Document 1 describes an optical signal detection circuit that detects whether or not an optical signal is input based on a differential signal obtained by photoelectrically converting an optical signal.
- the differential amplifier circuit differentially amplifies the differential signal input via the coupling capacitor and outputs the amplified output signal.
- the differential current addition circuit adds a DC current corresponding to the input offset adjustment voltage to the positive phase signal and the negative phase signal of the amplified output signal, thereby reducing the DC offset of the positive phase signal and the negative phase signal. It adjusts the voltage and outputs it as a current addition output signal.
- the comparator compares the voltage values of the positive phase signal and the negative phase signal of the current addition output signal, and outputs the comparison result as a comparison output signal.
- the holding circuit rectifies the comparison output signal, charges the holding capacitor, and discharges the DC holding voltage obtained by the charging through the discharging resistor.
- the hysteresis comparator circuit compares the holding voltage with two different determination threshold voltages determined by the input sensitivity adjustment voltage, and outputs the comparison result as an optical signal detection signal indicating whether or not an optical signal is input.
- Non-Patent Document 1 describes an electrical idle detector that detects an electrical idle (EI) signal using a peak detector including a source follower.
- Patent Document 1 uses a differential amplifier circuit.
- a differential amplifier circuit increases power consumption by requiring operation at a high power supply voltage, and increases circuit area by requiring the use of large-sized transistors.
- Non-Patent Document 1 uses a source follower. Since the source follower has a voltage gain of 1 or less, the signal is attenuated, so a high voltage gain is required, the power consumption increases, and the circuit area increases due to the need to use a large size transistor.
- An object of the present invention is to provide a detection circuit capable of reducing power consumption and circuit area when detecting an idle mode based on differential input voltages.
- the detection circuit includes a differential input circuit that receives a differential input voltage and generates a first differential detection current corresponding to the differential input voltage, and a current mirror circuit that combines the differential input circuit and the first a detection current generation circuit that generates a second differential detection current corresponding to one differential detection current; and a detection current generation circuit that receives the second differential detection current and has a voltage corresponding to the second differential detection current.
- a detection voltage generation circuit that generates a detection voltage
- a comparison circuit that compares the detection voltage with a reference voltage and outputs a signal indicating whether the differential input voltage is in a voltage state indicating a predetermined idle mode.
- Power consumption and circuit area can be reduced when detecting the idle mode based on the differential input voltage.
- FIG. 1 is a block diagram showing a configuration example of a semiconductor integrated circuit according to this embodiment.
- FIG. 2 is a circuit diagram showing a configuration example of a detection circuit.
- FIG. 3 is a diagram showing an example of voltage waveforms for explaining the operation of the detection circuit.
- FIG. 4 is a diagram showing an example of simulation results of voltage waveforms.
- FIG. 5 is a diagram showing an example of simulation results of voltage waveforms.
- FIG. 1 is a block diagram showing a configuration example of a semiconductor integrated circuit 100 according to this embodiment.
- a semiconductor integrated circuit 100 has a receiving circuit 101 and an internal circuit 102 .
- the receiving circuit 101 receives differential input voltages IP and IN and outputs received data to the internal circuit 102 .
- Internal circuit 102 processes the received data.
- the receiving circuit 101 receives input voltages IP and IN.
- Input voltages IP and IN are differential input voltages.
- the input voltages IP and IN are differential input voltages representing data signals, one of which is at high level and the other is at low level.
- the input voltages IP and IN indicate the electrical idle (EI) signal and both are substantially low level.
- the electrical idle (EI) is simply referred to as idle.
- the receiver circuit 101 includes a termination resistor 111, a continuous-time linear equalizer (CTLE) 112, a decision feedback equalizer (DFE) 113, a demultiplexer circuit (DEMUX) 114, a clock generator 115, and a detector. It has a circuit 116 and a control circuit 117 .
- CTLE continuous-time linear equalizer
- DFE decision feedback equalizer
- DEMUX demultiplexer circuit
- the terminating resistor 111 is connected between the transmission lines of the input voltages IP and IN.
- the continuous-time linear equalization circuit 112 reduces intersymbol interference jitter (ISI jitter) of the received differential input voltages IP and IN.
- a clock generation circuit 115 generates a clock signal.
- the decision feedback equalization circuit 113 decides and equalizes the differential input voltage output from the continuous-time linear equalization circuit 112 in synchronization with the clock signal generated by the clock generation circuit, and outputs received data.
- the demultiplexer circuit 114 converts the received data output from the decision feedback equalization circuit 113 from serial to parallel and outputs the parallel received data to the internal circuit 102 .
- the detection circuit 116 receives the received differential input voltages IP and IN, and outputs a detection signal DET indicating whether or not the differential input voltages IP and IN are in a voltage state indicating a predetermined idle mode. As shown in FIG. 3, the detection signal DET is at high level during the idle mode period T1. During the active mode period T2, the detection signal DET becomes low level.
- the control circuit 117 When a high-level detection signal DET indicating that the differential input voltages IP and IN are in a voltage state indicating a predetermined idle mode, the control circuit 117 is controlled by the high-level power-down signal PD.
- the time linear equalization circuit 112, the decision feedback equalization circuit 113, the demultiplexer circuit 114, and the clock generation circuit 115 are turned off.
- the switching transistor causes the power supply potential node and disconnected from at least one of the reference potential nodes; Thereby, in the idle mode, the receiving circuit 101 can reduce power consumption.
- the control circuit 117 controls the power-down signal PD at a low level.
- the power supplies of the continuous time linear equalization circuit 112, the decision feedback equalization circuit 113, the demultiplexer circuit 114, and the clock generation circuit 115 are turned on.
- the switching transistor causes the power supply potential node and Connected to the reference potential node. Thereby, in the active mode, the receiving circuit 101 becomes operable.
- FIG. 2 is a circuit diagram showing a configuration example of the detection circuit 116 of FIG.
- the detection circuit 116 has p-channel field effect transistors 201 - 211 , n-channel field effect transistors 212 - 214 , resistors 215 - 226 , capacitors 227 - 228 and a comparison circuit 229 .
- the power supply potential node VDD is, for example, a 0.8V power supply potential node.
- the reference potential node VSS is, for example, a 0V ground node.
- the bias potential nodes BP and BN are bias potential nodes, respectively.
- the input voltages IP and IN are the same as the input voltages IP and IN of FIG. 1, respectively.
- a resistor 215 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 201 .
- the p-channel field effect transistor 201 has a gate connected to the bias potential node BP and a drain connected to the source of the p-channel field effect transistor 210 .
- a p-channel field effect transistor 210 has a gate connected to the node of the input voltage IP and a drain connected to the reference potential node VSS.
- a resistor 216 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 202 .
- the p-channel field effect transistor 202 has a gate connected to the bias potential node BP and a drain connected to the source of the p-channel field effect transistor 211 .
- the p-channel field effect transistor 211 has a gate connected to the node of the input voltage IN and a drain connected to the reference potential node VSS.
- a resistor 217 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 203 .
- the p-channel field effect transistor 203 has its gate and drain connected to the drain of the n-channel field effect transistor 212 .
- a resistor 218 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 204 .
- the p-channel field effect transistor 204 has a gate connected to the bias potential node BP and a drain connected to the drain of the n-channel field effect transistor 212 .
- a resistor 219 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 205 .
- the p-channel field effect transistor 205 has a gate connected to the bias potential node BP and a drain connected to the drain of the n-channel field effect transistor 213 .
- a resistor 220 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 206 .
- the p-channel field effect transistor 206 has its gate and drain connected to the drain of the n-channel field effect transistor 213 .
- the n-channel field effect transistor 212 has a gate connected to the source of the p-channel field effect transistor 210 and a source connected to the drain of the n-channel field effect transistor 214 .
- the n-channel field effect transistor 213 has a gate connected to the source of the p-channel field effect transistor 211 and a source connected to the drain of the n-channel field effect transistor 214 .
- the gate of the n-channel field effect transistor 214 is connected to the bias potential node BN.
- Resistor 224 is connected between the source of n-channel field effect transistor 214 and reference potential node VSS.
- a resistor 221 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 207 .
- the p-channel field effect transistor 207 has a gate connected to the drain of the n-channel field effect transistor 212 and a drain connected to the node N1.
- a resistor 222 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 208 .
- the p-channel field effect transistor 208 has a gate connected to the drain of the n-channel field effect transistor 213 and a drain connected to the node N1.
- a resistor 223 is connected between the power supply potential node VDD and the source of the p-channel field effect transistor 209 .
- a p-channel field effect transistor 209 has a gate connected to a bias potential node BP and a drain connected to a node N1.
- the capacitor 227 is connected between the node N1 and the reference potential node VSS.
- Resistor 225 is connected between node N1 and reference potential node VSS.
- Resistor 226 is connected between nodes N1 and N2.
- Capacitor 228 is connected between node N2 and reference potential node VSS.
- the detection voltage PK is the voltage of the node N2.
- the comparison circuit 229 compares the detection voltage PK with the reference voltage REF and outputs a detection signal DET.
- the detection signal DET is a signal indicating whether or not the differential input voltages IP and IN are in a voltage state indicating a predetermined idle mode.
- the detection circuit 116 has a level shift circuit 230 , a differential pair circuit 231 , a peak detection circuit 232 and a low pass filter circuit 233 .
- Level shift circuit 230 includes p-channel field effect transistors 201 , 202 , 210 and 211 and resistors 215 and 216 .
- P-channel field effect transistors 201 and 202 are each constant current sources.
- Voltage SP is the voltage at the gate of n-channel field effect transistor 212 .
- Voltage SN is the voltage at the gate of n-channel field effect transistor 213 .
- Voltages SP and SN are differential voltages.
- FIG. 3 is a diagram showing an example of voltage waveforms for explaining the operation of the detection circuit 116 of FIG.
- time t1 is an idle mode period T1.
- Time t1 to t2 is active mode period T2.
- the input voltages IP and IN are differential input voltages representing data signals, one of which is at high level and the other is at low level.
- the input voltages IP and IN indicate idle signals and are both substantially low level.
- Level shift circuit 230 level shifts differential input voltages IP and IN, eg, in the range of 0V to 190 mV, and outputs differential voltages SP and SN, eg, in the range of 500 mV to 675 mV.
- the voltage range of the differential voltages SP and SN is the voltage range because the differential pair of n-channel field effect transistors 212 and 213 operate in the operating region.
- the differential pair circuit 231 has differential pairs of n-channel field effect transistors 212 and 213 , resistors 217 to 220 and 224 , p-channel field effect transistors 203 to 206 and an n-channel field effect transistor 214 .
- P-channel field effect transistors 203 and 206 are each diode-connected.
- P-channel field effect transistors 204 and 205 are each constant current sources.
- the gates of n-channel field effect transistors 212 and 213 receive differential voltages SP and SN level shifted by level shift circuit 230 . A current corresponding to the voltage SP flows through the drain of the n-channel field effect transistor 212 .
- a current corresponding to the voltage SN flows through the drain of the n-channel field effect transistor 213 .
- a differential current (differential detection current) flows through the drains of the n-channel field effect transistors 212 and 213 .
- a differential pair circuit 231 generates a differential detection current according to the differential voltages SP and SN.
- the level shift circuit 230 raises the common mode voltage of the differential input voltages IP and IN until the differential pair of n-channel field effect transistors 212 and 213 reaches the operating region, and outputs the differential voltages SP and SN.
- a differential pair of n-channel field effect transistors 212 and 213 removes the common mode voltage of the differential voltages SP and SN.
- the level shift circuit 230 and differential pair circuit 231 form a differential input circuit, receive differential input voltages IP and IN, and generate differential detection currents corresponding to the differential input voltages IP and IN.
- the peak detection circuit 232 has a differential pair of p-channel field effect transistors 207 and 208, a p-channel field effect transistor 209, and resistors 221-223.
- a p-channel field effect transistor 209 is a constant current source for fine adjustment.
- the gates of p-channel field effect transistors 207 and 208 receive a differential voltage that depends on the differential current flowing through the drains of n-channel field effect transistors 212 and 213 .
- the p-channel field effect transistors 203 and 207 form a current mirror circuit whose gates are both connected to the drain of the n-channel field effect transistor 212, and the same current or a proportional current flows through them.
- the p-channel field effect transistors 206 and 208 form a current mirror circuit whose gates are both connected to the drain of the n-channel field effect transistor 213, and the same current or a proportional current flows through them. Since a differential current flows through the drains of the n-channel field effect transistors 212 and 231 , a differential current (differential detection current) also flows through the drains of the p-channel field effect transistors 207 and 208 . A current (peak current) that is the sum of the drain currents of the p-channel field effect transistors 207 and 208 flows through the node N1.
- the peak detection circuit 232 is a detection current generation circuit, forms a current mirror circuit together with the differential pair circuit 231, and detects a differential current (differential sense current).
- the tail currents of the differential pair of p-channel field effect transistors 207 and 208 flow through the resistor 225 .
- Resistor 225 receives the differential current flowing through the drains of p-channel field effect transistors 207 and 208 and produces a voltage corresponding to the differential current flowing through the drains of p-channel field effect transistors 207 and 208 .
- Resistor 225 converts the current flowing through node N1 into a voltage.
- the low-pass filter circuit 233 has a resistor 226 and a capacitor 228, low-pass filters the voltage of the node N1, and outputs the low-pass filtered detection voltage PK to the node N2.
- Detected voltage PK is a voltage obtained by reducing high frequency components with respect to the voltage of node N1.
- Capacitor 227 assists the low-pass filtering function of low-pass filter circuit 233 . Note that the capacity 227 may be deleted.
- the resistor 225 and the low-pass filter circuit 233 constitute a detection voltage generation circuit, receive differential current flowing through the drains of the p-channel field effect transistors 207 and 208, and receive differential current flowing through the drains of the p-channel field effect transistors 207 and 208. to generate a detection voltage PK having a voltage according to .
- the comparison circuit 229 compares the detection voltage PK and the reference voltage REF, and outputs a detection signal DET indicating whether or not the differential input voltages IP and IN are in a voltage state indicating a predetermined idle mode. Specifically, when the detection voltage PK is higher than the reference voltage REF, the comparison circuit 229 outputs a high-level detection signal DET indicating that the differential input voltages IP and IN are in a predetermined idle mode voltage state. to output
- FIG. 4 is a diagram showing an example of simulation results of voltage waveforms around time t1 in FIG.
- FIG. 5 is a diagram showing an example of a simulation result of voltage waveforms around time t2 in FIG.
- the differential input voltage IPN is a voltage of (input voltage IP)-(input voltage IN).
- the detection voltage PK is the voltage of the node N2 in FIG.
- the detection signal DET is the output signal of the comparison circuit 229 in FIG.
- the input voltages IP and IN are substantially the same voltage as shown in FIG. 3, so the differential input voltage IPN is substantially 0V. Since the input voltages IP and IN are both at a low level, the currents flowing through the drains of the differential pair of n-channel field effect transistors 212 and 213 are both small, and the currents flowing through the drains of the differential pair of p-channel field effect transistors 207 and 208 are small. The current flowing is also small. As a result, the detection voltage PK is lowered. Since the detection voltage PK is lower than the reference voltage REF, the comparison circuit 229 outputs a high-level detection signal DET. During the idle mode period T1, the detection signal DET is at high level.
- the amplitude of the differential input voltage IPN gradually increases. Then, the total current flowing to the drains of the differential pair of n-channel field effect transistors 212 and 213 gradually increases, and the total current flowing to the drains of the differential pair of p-channel field effect transistors 207 and 208 also gradually increases. As a result, the detection voltage PK gradually increases. Since the detection voltage PK is higher than the reference voltage REF after time t1, the comparison circuit 229 outputs the low-level detection signal DET. During the active mode period T2, the detection signal DET is at low level.
- the amplitude of the differential input voltage IPN gradually decreases. Then, the total current flowing to the drains of the differential pair of n-channel field effect transistors 212 and 213 gradually decreases, and the total current flowing to the drains of the differential pair of p-channel field effect transistors 207 and 208 also gradually decreases. As a result, the detection voltage PK gradually decreases.
- the comparison circuit 229 outputs the high-level detection signal DET because the detection voltage PK is lower than the reference voltage REF. During the idle mode period T1, the detection signal DET is at high level.
- the low-pass filter circuit 233 By providing the low-pass filter circuit 233, it is possible to reduce noise in which the detection signal DET alternately repeats a high level and a low level at a high frequency around times t1 and t2.
- the detection circuit 116 can output a high-level detection signal DET during the idle mode period T1 and output a low-level detection signal DET during the active mode period T2.
- the detection circuit 116 can detect with high accuracy the detection signal DET indicating whether the differential input voltages IP and IN are in a voltage state indicating the idle mode.
- Non-Patent Document 1 uses a source follower with a high voltage gain, so it requires operation at a high power supply voltage, which increases power consumption, and requires the use of large-sized transistors, which increases the circuit area.
- the detection circuit 116 does not use a source follower with a high voltage gain, but uses a current mirror circuit. The size of the transistor can be reduced and the circuit area can be reduced.
- comparison circuit 229 compares the low-frequency detection voltage DET output by the low-pass filter circuit 233 with the reference voltage REF, there is no need for high-speed operation, and power consumption and circuit area can be reduced.
- Power consumption and circuit area can be reduced when detecting the idle mode based on the differential input voltage.
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Abstract
Description
Claims (19)
- 差動入力電圧を受けとり、前記差動入力電圧に応じた第1の差動検出電流を生成する差動入力回路と、
前記差動入力回路とカレントミラー回路を構成し、前記第1の差動検出電流に応じた第2の差動検出電流を生成する検出電流生成回路と、
前記第2の差動検出電流を受けとり、前記第2の差動検出電流に応じた電圧を有する検出電圧を生成する検出電圧生成回路と、
前記検出電圧と基準電圧とを比較し、前記差動入力電圧が所定のアイドルモードを示す電圧状態であるか否かを示す信号を出力する比較回路と
を有する検出回路。 - 前記差動入力回路は、前記第1の差動検出電流が流れる第1の差動対のトランジスタを有する請求項1に記載の検出回路。
- 前記差動入力回路は、前記差動入力電圧をレベルシフトするレベルシフト回路を有し、
前記第1の差動対のトランジスタは、前記レベルシフト回路によりレベルシフトされた差動入力電圧を受けとる請求項2に記載の検出回路。 - 前記検出電流生成回路は、前記第1の差動検出電流に応じた差動電圧を受けとり、前記第2の差動検出電流を流す第2の差動対のトランジスタを有する請求項1~3のいずれか1項に記載の検出回路。
- 前記検出電圧生成回路は、前記第2の差動対のトランジスタのテール電流が流れる抵抗を有する請求項4に記載の検出回路。
- 前記検出電圧生成回路は、前記検出電圧をローパスフィルタリングするローパスフィルタ回路を有する請求項1~5のいずれか1項に記載の検出回路。
- 前記比較回路は、前記検出電圧が前記基準電圧より高い場合には、前記差動入力電圧が所定のアイドルモードを示す電圧状態であることを示す信号を出力する請求項1~6のいずれか1項に記載の検出回路。
- 受信した差動入力電圧の符号間干渉ジッタを低減する連続時間線形等化回路と、
前記受信した差動入力電圧を受けとり、前記差動入力電圧が所定のアイドルモードを示す電圧状態であるか否かを示す信号を出力する検出回路と、
前記差動入力電圧が所定のアイドルモードを示す電圧状態であることを示す信号が出力された場合には、前記連続時間線形等化回路の電源をオフに制御する制御回路とを有し、
前記検出回路は、
前記差動入力電圧を受けとり、前記差動入力電圧に応じた第1の差動検出電流を生成する差動入力回路と、
前記差動入力回路とカレントミラー回路を構成し、前記第1の差動検出電流に応じた第2の差動検出電流を生成する検出電流生成回路と、
前記第2の差動検出電流を受けとり、前記第2の差動検出電流に応じた電圧を有する検出電圧を生成する検出電圧生成回路と、
前記検出電圧と基準電圧とを比較し、前記差動入力電圧が所定のアイドルモードを示す電圧状態であるか否かを示す信号を出力する比較回路と
を有する受信回路。 - 前記連続時間線形等化回路が出力する差動入力電圧を判定及び等化処理し、受信データを出力する判定帰還型等化回路と、
前記判定帰還型等化回路が出力する受信データをシリアルからパラレルに変換するデマルチプレクサ回路と
を有し、
前記制御回路はさらに、前記判定帰還型等化回路と前記デマルチプレクサ回路の電源をオフに制御する請求項8に記載の受信回路。 - 前記差動入力回路は、前記第1の差動検出電流が流れる第1の差動対のトランジスタを有する請求項8又は9に記載の受信回路。
- 前記差動入力回路は、前記差動入力電圧をレベルシフトするレベルシフト回路を有し、
前記第1の差動対のトランジスタは、前記レベルシフト回路によりレベルシフトされた差動入力電圧を受けとる請求項10に記載の受信回路。 - 前記検出電流生成回路は、前記第1の差動検出電流に応じた差動電圧を受けとり、前記第2の差動検出電流を流す第2の差動対のトランジスタを有する請求項8~11のいずれか1項に記載の受信回路。
- 前記比較回路は、前記検出電圧が前記基準電圧より高い場合には、前記差動入力電圧が所定のアイドルモードを示す電圧状態であることを示す信号を出力する請求項8~12のいずれか1項に記載の受信回路。
- 差動入力電圧を受信し、受信データを出力する受信回路と、
前記受信データを処理する内部回路とを有し、
前記受信回路は、
前記受信した差動入力電圧の符号間干渉ジッタを低減する連続時間線形等化回路と、
前記受信した差動入力電圧を受けとり、前記差動入力電圧が所定のアイドルモードを示す電圧状態であるか否かを示す信号を出力する検出回路と、
前記差動入力電圧が所定のアイドルモードを示す電圧状態であることを示す信号が出力された場合には、前記連続時間線形等化回路の電源をオフに制御する制御回路とを有し、
前記検出回路は、
前記差動入力電圧を受けとり、前記差動入力電圧に応じた第1の差動検出電流を生成する差動入力回路と、
前記差動入力回路とカレントミラー回路を構成し、前記第1の差動検出電流に応じた第2の差動検出電流を生成する検出電流生成回路と、
前記第2の差動検出電流を受けとり、前記第2の差動検出電流に応じた電圧を有する検出電圧を生成する検出電圧生成回路と、
前記検出電圧と基準電圧とを比較し、前記差動入力電圧が所定のアイドルモードを示す電圧状態であるか否かを示す信号を出力する比較回路と
を有する半導体集積回路。 - 前記連続時間線形等化回路が出力する差動入力電圧を判定及び等化処理し、受信データを出力する判定帰還型等化回路と、
前記判定帰還型等化回路が出力する受信データをシリアルからパラレルに変換するデマルチプレクサ回路と
を有し、
前記制御回路はさらに、前記判定帰還型等化回路と前記デマルチプレクサ回路の電源をオフに制御する請求項14に記載の半導体集積回路。 - 前記差動入力回路は、前記第1の差動検出電流が流れる第1の差動対のトランジスタを有する請求項14又は15に記載の半導体集積回路。
- 前記差動入力回路は、前記差動入力電圧をレベルシフトするレベルシフト回路を有し、
前記第1の差動対のトランジスタは、前記レベルシフト回路によりレベルシフトされた差動入力電圧を受けとる請求項16に記載の半導体集積回路。 - 前記検出電流生成回路は、前記第1の差動検出電流に応じた差動電圧を受けとり、前記第2の差動検出電流を流す第2の差動対のトランジスタを有する請求項14~17のいずれか1項に記載の半導体集積回路。
- 前記比較回路は、前記検出電圧が前記基準電圧より高い場合には、前記差動入力電圧が所定のアイドルモードを示す電圧状態であることを示す信号を出力する請求項14~18のいずれか1項に記載の半導体集積回路。
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CN202180098512.4A CN117355942A (zh) | 2021-05-28 | 2021-05-28 | 检测电路、接收电路以及半导体集成电路 |
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Citations (7)
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---|---|---|---|---|
JPH01293788A (ja) * | 1988-05-20 | 1989-11-27 | Mitsubishi Electric Corp | 位相検出回路 |
JP2006246478A (ja) * | 2005-03-01 | 2006-09-14 | Seiko Epson Corp | クロック・データ・リカバリ回路の周波数を維持する方法、前記方法を実施するように適合されたコンピュータ読み取り可能な命令の組を含む媒体または波形、およびクロック制御回路 |
JP2007019648A (ja) * | 2005-07-05 | 2007-01-25 | Seiko Epson Corp | データ転送制御装置及び電子機器 |
JP2013048322A (ja) * | 2011-08-29 | 2013-03-07 | Renesas Electronics Corp | 半導体集積回路装置 |
JP2013232747A (ja) * | 2012-04-27 | 2013-11-14 | Renesas Electronics Corp | 受信回路及び受信方法 |
JP2014022791A (ja) * | 2012-07-12 | 2014-02-03 | Seiko Npc Corp | Ecl出力回路 |
JP2019169803A (ja) * | 2018-03-22 | 2019-10-03 | 東芝メモリ株式会社 | 受信装置およびデータ受信方法 |
-
2021
- 2021-05-28 WO PCT/JP2021/020377 patent/WO2022249441A1/ja active Application Filing
- 2021-05-28 JP JP2023523901A patent/JPWO2022249441A1/ja active Pending
- 2021-05-28 CN CN202180098512.4A patent/CN117355942A/zh active Pending
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH01293788A (ja) * | 1988-05-20 | 1989-11-27 | Mitsubishi Electric Corp | 位相検出回路 |
JP2006246478A (ja) * | 2005-03-01 | 2006-09-14 | Seiko Epson Corp | クロック・データ・リカバリ回路の周波数を維持する方法、前記方法を実施するように適合されたコンピュータ読み取り可能な命令の組を含む媒体または波形、およびクロック制御回路 |
JP2007019648A (ja) * | 2005-07-05 | 2007-01-25 | Seiko Epson Corp | データ転送制御装置及び電子機器 |
JP2013048322A (ja) * | 2011-08-29 | 2013-03-07 | Renesas Electronics Corp | 半導体集積回路装置 |
JP2013232747A (ja) * | 2012-04-27 | 2013-11-14 | Renesas Electronics Corp | 受信回路及び受信方法 |
JP2014022791A (ja) * | 2012-07-12 | 2014-02-03 | Seiko Npc Corp | Ecl出力回路 |
JP2019169803A (ja) * | 2018-03-22 | 2019-10-03 | 東芝メモリ株式会社 | 受信装置およびデータ受信方法 |
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