Voltage controlled oscillator

Abstract

Abstract PURPOSE:To reduce number of components by giving a current depending on the control current in response to the oscillation mode so as to activate the titled oscillator at a low voltage. CONSTITUTION:Collectors of transistors (TRs) Q11, Q12 are connected to a power supply VB via resistors R11, R12, connected to the base of other TR, the emitters of the TRs Q11, Q12 are connected mutually via a capacitor C and connected to collectors of TRs Q13, Q14 and constant current sources S11, S12. The emitters of the TRs Q13, Q14 are connected to common via resistors R13, R14 and each base is controlled by a control voltage Vf. Further, the anode of diodes D11, D12 is connected to each base of the TRs Q11, Q12, each cathode of the diodes D11, D12 is connected mutually and connected to the collector of the TR Q15. The emitter of the TR Q15 is connected to common via a resistor R15 and the base is controlled by the control voltage Vf. Thus, the power voltage VB is reduced to a required value.

Inventors

• 👤 Toshiharu Kawaguchi
• 👤 川口　俊治

Bibliographic Details