KR950004719A - IC with built-in voltage controlled oscillation circuit - Google Patents

Abstract

The present invention relates to an IC with a voltage-controlled oscillation circuit which can be integrated with an entire circuit and can easily adjust the oscillation frequency of a plurality of output signals.

Variable amplifiers are employed in each of the oscillation circuits 2, 3, and 5, and the capacitors are integrated into ICs. In addition, an operating current adjusting circuit 6 having a resistance circuit 7 is provided, and the resistance value of the resistance circuit 7 is set. The operating current of each variable amplifier is adjusted by the operating current adjustment signal H having a value corresponding to this resistance value. Thereby, each oscillation circuit can be combined easily and can be adjusted easily, and the external adjustment circuit is also unnecessary.

Description

IC with built-in voltage controlled oscillation circuit

Since this is an open matter, no full text was included.

1 is a block diagram of an embodiment of an integrated circuit of a voltage controlled oscillation circuit of the configuration of the present invention, and FIG. 2 is a detailed circuit diagram of an embodiment of an integrated circuit of a voltage controlled oscillation circuit of the configuration of the present invention. A circuit diagram of a current regulation circuit in an IC with a built-in voltage controlled oscillation circuit of the invention.

Claims (2)

In an IC with a voltage-controlled oscillating circuit incorporating a voltage-controlled oscillating circuit whose oscillation frequency is controlled in accordance with the control voltage, the current adjusting circuit 6, the first oscillating circuit 2 having the first amplifier, and the second amplifier And a second oscillation circuit (3) having a second oscillation circuit (3), wherein the current adjustment circuit (6) generates an operating current adjustment signal (H) according to the resistance of the resistance circuit (7) consisting of a plurality of resistors, (2) generates a first output signal C whose oscillation frequency is controlled according to the operating current of the first amplifier in the first oscillation loop, and the operating current of the first amplifier is the control voltage A (or the voltage thereof). The second oscillation circuit 3 generates a second output signal D whose oscillation frequency is controlled in accordance with the operating current of the second amplifier in the second oscillation loop. 2 The operating current of the amplifier is the control voltage (A) or other control voltage (or The voltage-current-converted current signal), and the operating currents of the first amplifier and the second amplifier are adjusted together by the operating current adjustment signal (H). The current adjusting circuit (6) according to claim 1, wherein the current adjusting circuit (6) includes a constant current circuit in which a constant current of a current value flows in response to the voltage generated by the partial pressure, respectively, in place of the resistance circuit (7). An IC with a voltage-controlled oscillating circuit, characterized in that for generating a current of the sum of the constant current of the constant current circuit as the operating current adjustment signal (H). ※ Note: The disclosure is based on the initial application.